Add 72/80 and 21/4
1st number: 72/80, 2nd number: 5 1/4
72/80 + 21/4 is 123/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 4 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
72/80 = 72 × 1/80 × 1 = 72/80 - Likewise, for the 2nd fraction, since 4 × 20 = 80,
21/4 = 21 × 20/4 × 20 = 420/80 - Add the two like fractions:
72/80 + 420/80 = 72 + 420/80 = 492/80 - 492/80 simplified gives 123/20
- So, 72/80 + 21/4 = 123/20
In mixed form: 63/20
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